Search for a light Higgs-like boson $A^0$ in $J/\psi$ radiative decays - INSPIRE

DataBETA

Search for a light Higgs-like boson $A^0$ in $J/\psi$ radiative decays

BESIII

Collaboration

Nov, 2011

7 pages

Published in:

Phys.Rev.D 85 (2012) 092012

e-Print:

1111.2112 [hep-ex]

DOI:

10.1103/PhysRevD.85.092012

PDG:

{{\mathit J / \psi}{(1S)}}

\rightarrow

{{\mathit \gamma}}{{\mathit A}^{0}}

\rightarrow

{{\mathit \gamma}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}

Experiments:

View in:

reference search54 citations

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Abstract: (arXiv)

Using a data sample containing 1.06x10^8 psi' events collected with the BESIII detector at the BEPCII electron-positron collider, we search for a light exotic particle X in the process psi' -> pi^+ pi^- J/psi, J/psi -> gamma X, X -> mu^+ mu^-. This light particle X could be a Higgs-like boson A^0, a spin-1 U boson, or a pseudoscalar sgoldstino particle. In this analysis, we find no evidence for any mu^+mu^- mass peak between the mass threshold and 3.0 GeV/c^2. We set 90%-confidence-level upper limits on the product-branching fractions for J/psi -> gamma A^0, A^0 -> mu^+ mu^- which range from 4x10^{-7} to 2.1x10^{-5}, depending on the mass of A^0, for M(A^0)<3.0 GeV/c^2. Only one event is seen in the mass region below 255 MeV/c^2 and this has a mu^+mu^- mass of 213.3 MeV/c^2 and the product branching fraction upper limit 5x10^{-7}.

Note:

7 pages, 3 figures, submitted to Physical Review D

13.20.Gd
14.80.Da
13.66.Fg
14.40.Pq
mass: threshold
J/psi(3100): radiative decay
electron positron: annihilation
supersymmetry
Beijing Stor
BES

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